/* Theme: Navy (same palette as taller-spring-security) */
:root {
  --bg: #f3f6fa;
  --card: #ffffff;
  --text: #0f2540;
  --muted: #4a5a72;
  --accent: #2f80ed;
  --border: #d5deea;
  --head: #0f2540;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1a2e;
    --card: #132a47;
    --text: #e6eef9;
    --muted: #9db0c8;
    --accent: #5aa2f5;
    --border: #1f3a5c;
    --head: #e6eef9;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1a2e;
  --card: #132a47;
  --text: #e6eef9;
  --muted: #9db0c8;
  --accent: #5aa2f5;
  --border: #1f3a5c;
  --head: #e6eef9;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
main { max-width: 820px; margin: 0 auto; padding: 48px 16px; }
.site-title { font-size: 2rem; font-weight: 700; color: var(--head); text-decoration: none; }
.site-header p { margin: 4px 0 0; color: var(--muted); }
.post-list h2 { margin-top: 36px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
}
.card h3 { margin: 6px 0; font-size: 1.2rem; }
.card p { margin: 0; color: var(--muted); }
.meta { margin: 0; font-size: 0.875rem; color: var(--muted); }
.tag {
  display: inline-block;
  padding: 0 8px;
  margin-right: 4px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
}
.post h1 { font-size: 1.8rem; margin: 8px 0 12px; }
.links a { margin-right: 12px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
pre { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 12px; overflow-x: auto; }
footer { margin-top: 40px; color: var(--muted); font-size: 0.9rem; }